Question

last question i need help with :)

Answer 1

determine whether y varies directly with x. if so find the constant of variation k and write the equation

Answer 2

not really sure what to do for this question

Answer 3

Im on the app so i cant see it

Answer 4

let me see if i can write it out then

Answer 5

Alright

Answer 6

Am trying to determine the sequence of the y values first and see if there's any relationship between x and y

Answer 7

Or he can help you since he can see the question

Answer 8

I see that x is increasing by 3 everytime.

Answer 9

@jhonyy9

Answer 10

than you check x increasing by 1,6 to get y

when x = 4 so 4*1,6 = 6,4
or for x= 10 so 10*1,6 = 16

and so all

what mean this than ?

Answer 11

what? i dont get it

Answer 12

so this mean that y varies directly with x and the variation constant is 1,6

ok. ?

Answer 13

ok....

Answer 14

do you understand it now sure right ?

Answer 15

1,6 is this constant k

Answer 16

i dont think that is right

Answer 17

y=kx try it than

Answer 18

for example

16 = 1,6 *10

Answer 19

or

6,4 = 1,6*4

Answer 20

or

11,2 =1,6*7

Answer 21

you dont believe it again too ?

Answer 22

tricial please try it you - ty.

Answer 23

when y varies directly with x then y = kx where k is the constant of variation
as x increases, y increases or as x decreases, y decreases
here x increases, y increases for any 2 points y/x = k
if you were to plot the point you would get a straight line with the slope = k
@jhonyy9 showed above that k = 1.6 so your equation becomes y = 1.6 x
example when x = 4 y = 6.4 : y = 1.6* 4